High-efficiency low-resistance filter

Abstract

The utility model relates to the technical field of filters, and discloses a high-efficiency low-resistance filter which comprises a shell, and a front filter screen, an activated carbon filter element, a formaldehyde filter element and an HEPA (High Efficiency Particulate Air) filter element which are sequentially arranged in the shell along the air flowing direction, the shell is provided with a mounting structure for quickly disassembling and assembling the front filter screen and an inserting structure for quickly disassembling and assembling the activated carbon filter element, the formaldehyde filter element and the HEPA filter element; the mounting structure comprises a notch formed in one side of the shell; the plug-in structure comprises a plug-in fixing part; according to the utility model, through the arrangement of the insertion fixing part, the activated carbon filter element, the formaldehyde filter element and the HEPA filter element can be stably mounted, so that the activated carbon filter element, the formaldehyde filter element and the HEPA filter element are prevented from moving in the shell, the activated carbon filter element, the formaldehyde filter element and the HEPA filter element can be stably mounted, and the stable use of the filter elements is facilitated; and the air filtering effect of the filter is ensured.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a high-efficiency, low-resistance filter. Background Technology

[0002] High-efficiency, low-resistance air filters are mainly used to capture particulate dust and various suspended matter larger than 0.5μm. They are mainly composed of two parts: filter element and housing. The basic requirements are high filtration efficiency, low flow resistance, and the ability to be used continuously for a long time to reduce the cost of consumables in the later stage.

[0003] During prolonged continuous use, existing high-efficiency low-resistance filters often accumulate dust or impurities in their filter elements, necessitating disassembly. For example, patent CN211562187U discloses a high-efficiency low-resistance filter that allows for filter element disassembly and installation via a combination of slide rails and pulleys during cleaning or replacement. However, the filter element in this filter lacks a limiting and fixing structure after installation. Due to the sliding between the slide rails and pulleys, the filter element often moves inside the housing, resulting in unstable installation and affecting the filter's performance. Utility Model Content

[0004] This invention proposes a high-efficiency, low-resistance filter to solve the problem that existing filter elements lack a limiting and fixing structure after installation, and the filter element often moves inside the housing due to the sliding between the slide and the pulley.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency low-resistance filter, including a housing, and a pre-filter, an activated carbon filter, a formaldehyde filter and a HEPA filter arranged sequentially inside the housing along the airflow direction. The housing is provided with an installation structure for quick assembly and disassembly of the pre-filter, and a plug-in structure for quick assembly and disassembly of the activated carbon filter, the formaldehyde filter and the HEPA filter.

[0006] The installation structure includes a slot on one side of the housing, the pre-filter can be placed in the slot, and multiple inserts are fixed on one side of the pre-filter. The side wall of the slot is provided with insertion holes corresponding to the multiple inserts.

[0007] The plug-in structure includes a plug-in fixing part, which includes a first splicing block installed on one side of the activated carbon filter, formaldehyde filter, and HEPA filter, and a first plug-in groove, a second plug-in groove, and a third plug-in groove opened on the inner wall of the outer shell. The first plug-in groove, the second plug-in groove, and the third plug-in groove are all fixed with a second splicing block that mates with the first splicing block. The outer wall of the outer shell is provided with a countersunk hole, and a pin is inserted into the countersunk hole. The first splicing block and the second splicing block are both provided with pin holes that mate with the pins.

[0008] Preferably, the insertion structure further includes a sliding limiting part, which includes a third slider installed on both sides of the activated carbon filter element, a second slider installed on both sides of the formaldehyde filter element, and a first slider installed on both sides of the HEPA filter element. The inner wall of the outer shell is provided with a first sliding groove, a second sliding groove, and a third sliding groove with successively decreasing lengths. The first sliding groove corresponds to the first slider, the second sliding groove corresponds to the second slider, and the third sliding groove corresponds to the third slider.

[0009] Preferably, the plug-in structure further includes a guide member, which includes a guide block installed on one side of the activated carbon filter, formaldehyde filter, and HEPA filter, and a guide groove is provided on the inner wall of the housing for the guide block to slide.

[0010] Preferably, both the first and second splicing blocks are L-shaped, and one side of both the first and second splicing blocks extends outward to form a protrusion, while both the first and second splicing blocks are recessed inward to form a groove for inserting the protrusion.

[0011] Preferably, the first splicing block is further provided with an elastic element that automatically separates it from the second splicing block, and the elastic element includes an inner cavity and a notch that are opened in the first splicing block and communicate with each other. A push plate is provided in the notch, and one side of the push plate contacts the side wall of the second splicing block. A spring is fixed in the inner cavity, and one end of the spring is fixedly connected to the other side of the push plate.

[0012] Preferably, a positioning block is also installed on one side of the second splicing block, and a positioning groove that cooperates with the positioning block is opened on one side of the push plate.

[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0014] (1) By setting the plug-in fixing part, the activated carbon filter, formaldehyde filter and HEPA filter can be stably installed, thereby avoiding the activated carbon filter, formaldehyde filter and HEPA filter moving inside the housing. This can achieve stable installation of the filter, which is conducive to the stable use of the filter and ensures the filter's air filtration effect.

[0015] Furthermore, the sliding limit mechanism allows for the sliding installation and removal of activated carbon filters, formaldehyde filters, and HEPA filters, facilitating quick cleaning or replacement and ensuring their proper functioning.

[0016] (2) By setting the elastic element, the first splicing block and the second splicing block can be automatically separated, which makes it easy to remove the activated carbon filter, formaldehyde filter and HEPA filter from the shell, further facilitating the quick disassembly and assembly of the activated carbon filter, formaldehyde filter and HEPA filter, and is beneficial to the cleaning or replacement of the activated carbon filter, formaldehyde filter and HEPA filter. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is an exploded view of the present invention;

[0020] Figure 3 This utility model Figure 2 A partial sectional view of the inner shell;

[0021] Figure 4 This is a schematic diagram of the structure when the first splicing block and the second splicing block of this utility model are spliced ​​together;

[0022] Figure 5 This utility model Figure 4 Exploded view;

[0023] Figure 6 This utility model Figure 4 A partial sectional view;

[0024] Figure 7 This utility model Figure 5 A partial sectional view;

[0025] In the diagram: 1. Outer shell; 2. Pre-filter; 3. Countersunk hole; 4. Insertion structure; 5. Guide block; 6. Guide groove; 7. Groove; 8. Insertion hole; 9. Insertion block; 10. Activated carbon filter element; 11. Formaldehyde filter element; 12. HEPA filter element;

[0026] 41. Pin post; 42. First splicing block; 43. First slider; 44. Second slider; 45. Third slider; 46. First slide groove; 47. Second slide groove; 48. Third slide groove; 49. First insertion groove; 410. Second insertion groove; 411. Third insertion groove; 412. Second splicing block; 413. Elastic element; 414. Pin hole; 415. Protrusion; 416. Groove; 417. Positioning block;

[0027] 4131. Push plate; 4132. Spring; 4133. Inner cavity; 4134. Notch. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] This utility model provides, for example Figures 1-7 The high-efficiency, low-resistance filter shown includes a housing 1 and a pre-filter 2, an activated carbon filter 10, a formaldehyde filter 11, and a HEPA filter 12 arranged sequentially inside the housing 1 along the airflow direction. The housing 1 is provided with an installation structure for quick assembly and disassembly of the pre-filter 2 and a plug-in structure 4 for quick assembly and disassembly of the activated carbon filter 10, the formaldehyde filter 11, and the HEPA filter 12.

[0030] The installation structure includes a slot 7 opened on one side of the outer casing 1, the pre-filter 2 can be placed in the slot 7, and a plurality of inserts 9 are fixed on one side of the pre-filter 2. Insert holes 8 corresponding to the plurality of inserts 9 are opened on the side wall of the slot 7.

[0031] The plug-in structure 4 includes a plug-in fixing part, which includes a first splicing block 42 installed on one side of the activated carbon filter 10, formaldehyde filter 11 and HEPA filter 12, and a first plug-in groove 49, a second plug-in groove 410 and a third plug-in groove 411 opened on the inner wall of the outer shell 1. The first plug-in groove 49, the second plug-in groove 410 and the third plug-in groove 411 are all fixed with a second splicing block 412 that cooperates with the first splicing block 42. The outer wall of the outer shell 1 is provided with a countersunk hole 3, and a pin post 41 is inserted into the countersunk hole 3. The first splicing block 42 and the second splicing block 412 are both provided with pin holes 414 that cooperate with the pin post 41.

[0032] In use, the HEPA filter 12, formaldehyde filter 11, and activated carbon filter 10 can be sequentially inserted into the housing 1. The first connecting block 42 on the HEPA filter 12 is inserted into the first insertion slot 49 and mates with the second connecting block 412 within the first insertion slot 49. The first connecting block 42 on the formaldehyde filter 11 is inserted into the second insertion slot 410 and mates with the second connecting block 412 within the second insertion slot 410. The first connecting block 42 on the activated carbon filter 10 is inserted into the third insertion slot 411 and mates with the second connecting block 412 within the third insertion slot 411. Then, the pin 41 is inserted through the countersunk hole 3 into its corresponding pin hole 414, thereby securing the HEPA filter 12, formaldehyde filter 11, and activated carbon filter 10, completing the HEPA... The filter element 12, formaldehyde filter element 11, and activated carbon filter element 10 are installed. Then, the pre-filter 2 is inserted into the slot 7. At this time, the insert 9 on the pre-filter 2 is inserted into its corresponding insertion hole 8 to fix the pre-filter 2 to the outer shell 1, thereby realizing the assembly of the high-efficiency low-resistance filter. After assembly, the filter is installed in the use position through the outer shell 1. When air flows in, the air passes through the pre-filter 2, activated carbon filter element 10, formaldehyde filter element 11, and HEPA filter element 12 in sequence for filtration. The pre-filter 2 intercepts larger particulate impurities in the air, the activated carbon filter element 10 removes odors from the air, the formaldehyde filter element 11 removes formaldehyde from the air, and the HEPA filter element 12 efficiently intercepts fine particulate impurities in the air, thereby achieving air treatment.

[0033] Furthermore, when the pre-filter 2 needs cleaning or replacement, it can be pulled out of the slot 7, and the insert 9 can be pulled out of the socket 8, thus removing the pre-filter 2. Afterwards, the pre-filter 2 can be cleaned or replaced. After cleaning or replacement, the pre-filter 2 can be inserted back into the slot 7, and the insert 9 and socket 8 will work together to secure it in the slot 7, completing the installation of the pre-filter 2. When the activated carbon filter 10, formaldehyde filter 11, and HEPA filter 12 need cleaning or replacement, the pre-filter 2 should first be pulled out of the slot 7. Remove the pin 41 from the slot 7 and pull it out from the pin hole 414. Then, pull out the activated carbon filter 10, formaldehyde filter 11, and HEPA filter 12 from the outer shell 1 in sequence to disassemble them. Then, clean or replace the activated carbon filter 10, formaldehyde filter 11, and HEPA filter 12 (only replace the HEPA filter 12 during cleaning or replacement). After cleaning or replacement, insert the HEPA filter 12, formaldehyde filter 11, and activated carbon filter 10 into the outer shell 1 in sequence to complete the installation.

[0034] In summary, this utility model enables the quick assembly and disassembly of the pre-filter 2, activated carbon filter 10, formaldehyde filter 11, or HEPA filter 12, thereby facilitating the cleaning or replacement of the pre-filter 2, activated carbon filter 10, formaldehyde filter 11, or HEPA filter 12, improving cleaning or replacement efficiency, ensuring the filter's air filtration effect, and promoting the efficient use of the filter.

[0035] Furthermore, in this embodiment, as Figure 2 and Figure 3 As shown, the plug-in structure 4 also includes a sliding limiting part, which includes a third slider 45 installed on both sides of the activated carbon filter element 10, a second slider 44 installed on both sides of the formaldehyde filter element 11, and a first slider 43 installed on both sides of the HEPA filter element 12. The inner wall of the outer shell 1 is provided with a first sliding groove 46, a second sliding groove 47, and a third sliding groove 48 with successively decreasing lengths. The first sliding groove 46 corresponds to the first slider 43, the second sliding groove 47 corresponds to the second slider 44, and the third sliding groove 48 corresponds to the third slider 45.

[0036] During the installation of the activated carbon filter element 10, formaldehyde filter element 11, and HEPA filter element 12, the third slider 45, the second slider 44, and the first slider 43 are respectively inserted into their corresponding third groove 48, second groove 47, and first groove 46 to limit the sliding of the activated carbon filter element 10, formaldehyde filter element 11, and HEPA filter element 12 to the outer shell 1. This facilitates the quick installation and removal of the activated carbon filter element 10, formaldehyde filter element 11, and HEPA filter element 12, and makes it convenient to clean or replace them.

[0037] Furthermore, in this embodiment, as Figure 2 and Figure 3 As shown, the plug-in structure 4 also includes a guide member, which includes a guide block 5 installed on one side of the activated carbon filter 10, the formaldehyde filter 11 and the HEPA filter 12. A guide groove 6 is provided on the inner wall of the outer shell 1 for the guide block 5 to slide.

[0038] During the installation of activated carbon filter 10, formaldehyde filter 11 and HEPA filter 12, guide block 5 can be inserted into guide groove 6 and slide along guide groove 6 to limit the sliding of activated carbon filter 10, formaldehyde filter 11 and HEPA filter 12 to the outer shell 1, which is conducive to the stable and quick installation of activated carbon filter 10, formaldehyde filter 11 and HEPA filter 12.

[0039] Furthermore, in this embodiment, as Figures 2-7As shown, both the first splicing block 42 and the second splicing block 412 are L-shaped, and one side of both the first splicing block 42 and the second splicing block 412 extends outward to form a protrusion 415. Both the first splicing block 42 and the second splicing block 412 are recessed inward to form a groove 416 for inserting the protrusion 415.

[0040] When the first splicing block 42 and the second splicing block 412 are connected, the protrusion 415 can be inserted into the corresponding groove 416 to limit the distance between the first splicing block 42 and the second splicing block 412, thereby achieving a stable connection between the first splicing block 42 and the second splicing block 412, which facilitates the stable installation of the activated carbon filter element 10, the formaldehyde filter element 11 and the HEPA filter element 12.

[0041] In another embodiment, such as Figures 5-7 As shown, the first splicing block 42 is also provided with an elastic element 413 that automatically separates it from the second splicing block 412. The elastic element 413 includes an inner cavity 4133 and a notch 4134 that are opened in the first splicing block 42 and communicate with each other. A push plate 4131 is provided in the notch 4134, and one side of the push plate 4131 contacts the side wall of the second splicing block 412. A spring 4132 is fixed in the inner cavity 4133, and one end of the spring 4132 is fixedly connected to the other side of the push plate 4131.

[0042] During the disassembly of the activated carbon filter 10, formaldehyde filter 11, and HEPA filter 12, when the pin 41 is pulled out from the pin hole 414, the first splicing block 42 and the second splicing block 412 are no longer restricted. At this time, the spring 4132 pushes the push plate 4131 under its own elasticity, so that the first splicing block 42 and the second splicing block 412 automatically separate under the action of the push plate 4131. This makes it easy to remove the activated carbon filter 10, formaldehyde filter 11, and HEPA filter 12 from the outer shell 1, thereby further facilitating the quick disassembly and assembly of the activated carbon filter 10, formaldehyde filter 11, and HEPA filter 12, and is beneficial for cleaning or replacing the activated carbon filter 10, formaldehyde filter 11, and HEPA filter 12.

[0043] Furthermore, such as Figure 5 and Figure 7 As shown, a positioning block 417 is also installed on one side of the second splicing block 412, and a positioning groove that cooperates with the positioning block 417 is provided on one side of the push plate 4131.

[0044] When the second splicing block 412 aligns with the first splicing block 42, the push plate 4131 abuts against the second splicing block 412. At this time, the positioning block 417 is inserted into the positioning groove to position the push plate 4131 and the second splicing block 412, so that the push plate 4131 can stably spring the first splicing block 42 and the second splicing block 412 apart.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency, low-resistance filter, characterized in that: It includes a housing (1) and a pre-filter (2), an activated carbon filter (10), a formaldehyde filter (11) and a HEPA filter (12) arranged sequentially inside the housing (1) along the airflow direction. The housing (1) is provided with an installation structure for quick assembly and disassembly of the pre-filter (2) and a plug-in structure (4) for quick assembly and disassembly of the activated carbon filter (10), the formaldehyde filter (11) and the HEPA filter (12). The installation structure includes a slot (7) opened on one side of the outer shell (1), the pre-filter (2) can be placed in the slot (7), and a plurality of inserts (9) are fixed on one side of the pre-filter (2), and the side wall of the slot (7) is provided with insert holes (8) corresponding to the plurality of inserts (9). The plug-in structure (4) includes a plug-in fixing part, which includes a first splicing block (42) installed on one side of the activated carbon filter (10), formaldehyde filter (11) and HEPA filter (12), and a first plug-in groove (49), a second plug-in groove (410) and a third plug-in groove (411) opened on the inner wall of the outer shell (1). The first plug-in groove (49), the second plug-in groove (410) and the third plug-in groove (411) are all fixed with a second splicing block (412) that cooperates with the first splicing block (42). The outer wall of the outer shell (1) is provided with a countersunk hole (3), and a pin post (41) is inserted in the countersunk hole (3). The first splicing block (42) and the second splicing block (412) are both provided with pin holes (414) that cooperate with the pin post (41).

2. The high-efficiency low-resistance filter according to claim 1, characterized in that: The plug-in structure (4) also includes a sliding limiting part, which includes a third slider (45) installed on both sides of the activated carbon filter (10), a second slider (44) installed on both sides of the formaldehyde filter (11), and a first slider (43) installed on both sides of the HEPA filter (12). The inner wall of the outer shell (1) is provided with a first sliding groove (46), a second sliding groove (47), and a third sliding groove (48) with decreasing lengths in sequence. The first sliding groove (46) corresponds to the first slider (43), the second sliding groove (47) corresponds to the second slider (44), and the third sliding groove (48) corresponds to the third slider (45).

3. The high-efficiency low-resistance filter according to claim 1, characterized in that: The plug-in structure (4) also includes a guide, which includes a guide block (5) installed on one side of the activated carbon filter (10), formaldehyde filter (11) and HEPA filter (12), and a guide groove (6) is provided on the inner wall of the outer shell (1) for the guide block (5) to slide.

4. The high-efficiency low-resistance filter according to claim 1, characterized in that: Both the first splicing block (42) and the second splicing block (412) are L-shaped, and one side of both the first splicing block (42) and the second splicing block (412) extends outward to form a protrusion (415). Both the first splicing block (42) and the second splicing block (412) are recessed inward to form a groove (416) for inserting the protrusion (415).

5. The high-efficiency low-resistance filter according to claim 1, characterized in that: The first splicing block (42) is also provided with an elastic element (413) that automatically separates it from the second splicing block (412). The elastic element (413) includes an inner cavity (4133) and a notch (4134) that are opened in the first splicing block (42) and communicate with each other. A push plate (4131) is provided in the notch (4134), and one side of the push plate (4131) contacts the side wall of the second splicing block (412). A spring (4132) is fixed in the inner cavity (4133), and one end of the spring (4132) is fixedly connected to the other side of the push plate (4131).

6. The high-efficiency low-resistance filter according to claim 5, characterized in that: A positioning block (417) is also installed on one side of the second splicing block (412), and a positioning groove that cooperates with the positioning block (417) is provided on one side of the push plate (4131).

Images